Beyonce is at the centre of a baby riddle in the U.S. following reports she is pregnant.The Crazy In Love singer was said to be stunned after learning she is expecting a child with her husband, rapper Jay-Z. A source tells Us Weekly magazine, "B was shocked. She loves kids, but she wasn't ready to be a mother just yet. She really wanted to get her album done and tour the world again. (But she realises) this is a gift from God and she's so happy." And former Def Jam president Kevin Liles has already wished the couple congratulations: "Jay has been all about family since I met him, and he's always going to be. I wish them the best." The former Destiny's Child star, who wed the rapper in 2008, had not responded to the reports as WENN went to press.